Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Production process of polycarboxylate superplasticizer
The invention discloses a production process of a polycarboxylate superplasticizer. The process comprises: in a normal temperature state, adding polyether accounting for 20-50% of the total specific weight of the total solution into a reaction box, adding water accounting for 30-71.7% of the total specific weight of the total solution, and dissolving; carrying out free radical polymerization, wherein acrylic acid accounting for 3-7.5% of the total specific weight of the total solution is added into the dissolved solution in a dropwise manner, and mercaptoacetic acid accounting for 0.3% of thetotal specific weight of the total solution is added in a dropwise manner after dropwise adding is finished; carrying out a grafting reaction, wherein the solution subjected to free radical polymerization is heated to 80 to 85 DEG C, and a mixture formed by mixing ammonium persulfate accounting for 0.5% of the total specific weight of the total solution and water accounting for 4.5%-10.5% of the total specific weight of the total solution is added for 1.5 h in a dropwise manner; and carrying out heat preservation, wherein the solution subjected to the grafting reaction is subjected to heat preservation for 1.5 to 2 hours at a temperature of 80 DEG C.
本发明公开了一种聚羧酸减水剂生产工艺，在常温状态下，往反应箱内加入占总溶液总比重20％‑50%的聚醚时，后加入占总溶液总比重30%‑71.7％的水进行溶解，自由基聚合：往进行溶解后的溶液内滴加占总溶液总比重3％‑7.5%的丙烯酸，滴加完毕后开始滴加占总溶液总比重0.3％的巯基乙酸，接枝反应：对经过自由基聚合的溶液进行加热直到80‑85摄氏度，开始滴加一个半小时的混合物，所述混合物由占总溶液总比重0.5％过硫酸铵和占总溶液总比重4.5％‑10.5%水混合而成，保温：将经过接枝反应中的溶液在80摄氏度下，保温一个半小时至两个小时。
Production process of polycarboxylate superplasticizer
The invention discloses a production process of a polycarboxylate superplasticizer. The process comprises: in a normal temperature state, adding polyether accounting for 20-50% of the total specific weight of the total solution into a reaction box, adding water accounting for 30-71.7% of the total specific weight of the total solution, and dissolving; carrying out free radical polymerization, wherein acrylic acid accounting for 3-7.5% of the total specific weight of the total solution is added into the dissolved solution in a dropwise manner, and mercaptoacetic acid accounting for 0.3% of thetotal specific weight of the total solution is added in a dropwise manner after dropwise adding is finished; carrying out a grafting reaction, wherein the solution subjected to free radical polymerization is heated to 80 to 85 DEG C, and a mixture formed by mixing ammonium persulfate accounting for 0.5% of the total specific weight of the total solution and water accounting for 4.5%-10.5% of the total specific weight of the total solution is added for 1.5 h in a dropwise manner; and carrying out heat preservation, wherein the solution subjected to the grafting reaction is subjected to heat preservation for 1.5 to 2 hours at a temperature of 80 DEG C.
本发明公开了一种聚羧酸减水剂生产工艺，在常温状态下，往反应箱内加入占总溶液总比重20％‑50%的聚醚时，后加入占总溶液总比重30%‑71.7％的水进行溶解，自由基聚合：往进行溶解后的溶液内滴加占总溶液总比重3％‑7.5%的丙烯酸，滴加完毕后开始滴加占总溶液总比重0.3％的巯基乙酸，接枝反应：对经过自由基聚合的溶液进行加热直到80‑85摄氏度，开始滴加一个半小时的混合物，所述混合物由占总溶液总比重0.5％过硫酸铵和占总溶液总比重4.5％‑10.5%水混合而成，保温：将经过接枝反应中的溶液在80摄氏度下，保温一个半小时至两个小时。
Production process of polycarboxylate superplasticizer
一种聚羧酸减水剂生产工艺
RUAN HONGHAI (Autor:in) / WANG GUOXING (Autor:in) / XIA ZHEDONG (Autor:in) / ZHONG ZHENHAI (Autor:in)
08.09.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2023
Compound polycarboxylate superplasticizer and production process thereof
| Europäisches Patentamt | 2020